TypeError: int() argument must be a string or a number, not 'list'

[dan]

How to Reproduce

While doing a POST operation on wiki/WikiStart?action=diff&version=8, Trac issued an internal error.

In diff mode on wiki/WikiStart, if I press Update on the right, I get this error (no matter what display mode I set next to "Display differences").

Request parameters:

{'__FORM_TOKEN': u'a5542b492c29da81e77be5dc',
 'action': u'diff',
 'contextlines': u'2',
 'old_version': u'7',
 'page': u'WikiStart',
 'style': u'inline',
 'update': u'Update',
 'version': [u'8', u'8']} <--- this line probably generated the error

User Agent was: Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US) AppleWebKit/530.5 (KHTML, like Gecko) Chrome/2.0.172.33 Safari/530.5 same error with: Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5 (.NET CLR 3.5.30729)

System Information

Trac	0.11.1
Python	2.6.2 (release26-maint, Apr 19 2009, 02:11:59) [GCC 4.3.3]
setuptools	0.6c9
SQLite	3.6.10
pysqlite	2.5.0
Genshi	0.5.1
mod_python	3.3.1
Subversion	1.5.4 (r33841)
jQuery:	1.2.6

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/trac/web/main.py", line 423, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.6/dist-packages/trac/web/main.py", line 197, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.6/dist-packages/trac/wiki/web_ui.py", line 115, in process_request
    versioned_page = WikiPage(self.env, pagename, version=version)
  File "/usr/lib/python2.6/dist-packages/trac/wiki/model.py", line 43, in __init__
    self._fetch(name, version, db)
  File "/usr/lib/python2.6/dist-packages/trac/wiki/model.py", line 59, in _fetch
    (name, int(version)))
TypeError: int() argument must be a string or a number, not 'list'

[Remy Blank]

Known issue with Python 2.6 (#7876), fixed in 0.11.3. Please update your installation.